CN107134928A - Multimode full-bridge isolates DC DC inverter powers balance control methods and device - Google Patents
Multimode full-bridge isolates DC DC inverter powers balance control methods and device Download PDFInfo
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- CN107134928A CN107134928A CN201710402408.5A CN201710402408A CN107134928A CN 107134928 A CN107134928 A CN 107134928A CN 201710402408 A CN201710402408 A CN 201710402408A CN 107134928 A CN107134928 A CN 107134928A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of multimode full-bridge isolation DC DC inverter powers balance control methods and device, by obtaining each module transfer power maximum, then each module transfer power set-point is obtained after cooperateing with computing using overpower, then each module phase-shift phase is obtained by Phaseshift controlling amount computing module, switch controlling signal is obtained by modulation module again, the isolation DC DC inverter power balance controls of output-parallel multimode full-bridge are realized.The present invention have the advantages that operand simply, no-load current sensor；Method for controlling power balance can effectively reduce converter control system design of hardware and software cost.
Description
Technical field
(half-bridge three-level, full-bridge isolation DC-DC conversion are included the present invention relates to multimode full-bridge isolation DC-DC converter
Device) Control System Design and manufacture field, a kind of specifically multimode full-bridge isolation DC-DC converter power-balance controlling party
Method and device.
Background technology
Full-bridge isolates DC-DC converter because it has high electrical isolation, power density, the two-way flow of energy energy and module
The advantages of cascading easy, as developing rapidly for new energy Semiconductor Converting Technology has been achieved with being widely applied.Multimode outlet side is simultaneously
Connection full-bridge isolation DC-DC converter topological structure is even more to be widely used in solid-state transformer and train without power frequency electric power electronics to become
In depressor.
When full-bridge in parallel isolation DC-DC converter input side voltage magnitude is unequal or each parallel module in transformer circle
When number or leakage inductance are unequal, the power for flowing through each parallel module can be caused unequal, so that individual modules were likely to occur
Flow phenomenon, can damage converter topology, jeopardize safety when serious.To solve the problem, there is scholar to propose real-time integration method real
Show power-balance, but this method needs that inductive current and primary side H bridge output voltages are integrated and obtain actual power, then
By being controlled to the power that calculating is obtained, this considerably increases the computational complexity of control system.In addition, this method needs
Extra inductive current sensor is used in full-bridge isolation DC-DC converter, which increase system design cost.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of multimode full-bridge isolation DC-DC converter power-balance control
Method and device processed, it has the advantages that, and operand is simple, no-load current sensor；The method for controlling power balance can have
Effect ground reduces converter control system design of hardware and software cost.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of multimode full-bridge isolates DC-DC converter method for controlling power balance, comprises the following steps：
Step 1：Output voltage U is obtained by data acquisition moduleoWith parallel module #i input voltages Uini, i=1,
2……n；In outer voltage PI modules, output voltage UoFor the input of outer loop voltag PI controllers, the output of its PI controller
For virtual power specified rate P*, the quantity of power is the input quantity of overpower Collaborative Control module；
Step 2：Ensure each parallel module transimission power set-point pi *It is equal, have
p1 *=p2 *=...=pi *=...=pn *=p*/n
Wherein, pi *For module i transimission power set-points；Any parallel module #i can transmit peak power expression formula and be：
In formula, p* i,maxCan transimission power, U for module #i maximumsoFor output voltage, UiniFor module #i input voltages, niFor
Module #i transformer voltage ratios, LiFor module #i equivalent inductances；
Overpower Collaborative Control is carried out, is specially：
1) by formula (1) calculate can transimission power maximum, to each module can transimission power maximum sort, obtain maximum
Sequencing table, it is ascending to be designated as p successively* 1,max、p* 2,max、……、p* n,max；
2) p is compared*/ n in sequencing table with being respectively worth, if p* J, max<p*/n<p* J+1, max；
3) [p is compared*-(p* 1, max+p* 2, max……+p* J, max)]/(n-j) and p* J+1, maxSize, if after the former is less than
Person, then be transferred to step 4), no person is transferred to step 5)；
4) module # (j+1) is entered as [p to module #n power after sorting*-(p* 1, max+p* 2, max……+p* J, max)]/
(n-j)；After sequence module #1 to module #j power assignment be respectively its maximum power value；
5) j=j+1 is entered as to j, continues to be transferred to step 3)
Step 3：By overpower Collaborative Control module obtain each parallel module should transimission power amount, the transimission power amount enters
Enter Phaseshift controlling amount computing module；
Step 4：In Phaseshift controlling amount computing module, Phaseshift controlling is obtained according to quantity of power expression formula after each module reduction
Measure calculation formula
Try to achieve each module Phaseshift controlling amount Di；
Step 5：According to solving to obtain Phaseshift controlling amount Di, using single-phase shift mode control, switched by modulation module
Control signal, completes the control that full-bridge isolates DC-DC converter.
Outside a kind of isolation of multimode full-bridge DC-DC converter power balance controller, including data acquisition module, voltage
Ring PI modules, overpower Collaborative Control module, Phaseshift controlling amount computing module and modulation module；
The data acquisition module is connected respectively to outer voltage PI modules, overpower Collaborative Control module and Phaseshift controlling
Measure computing module；The outer voltage PI modules are also connected to overpower Collaborative Control module；The overpower Collaborative Control mould
Block is connected to Phaseshift controlling amount computing module；The Phaseshift controlling amount computing module is connected to modulation module；
The overpower Collaborative Control module, for each parallel module maximum transmission power comparative analysis, circulation compensation
Computing, obtains each parallel module transimission power set-point；
The Phaseshift controlling amount computing module, for input voltage, output voltage and overpower Collaborative Control module
The virtual power set-point of output carries out simplified operation, obtains real-time Phaseshift controlling amount；
The modulation module, the Phaseshift controlling for being obtained according to calculating measures opening for full-bridge isolation DC-DC converter
Close device pulse control signal.
Compared with prior art, the beneficial effects of the invention are as follows：1) computing of large amount of complex is not needed, is significantly reduced
The computing cost of control system.2) load current sensor is not needed, full-bridge isolation DC-DC converter hardware is significantly reduced
Design cost.
Brief description of the drawings
Fig. 1 is multimode full-bridge isolation DC-DC converter power balance controller structural representation in the present invention.
Fig. 2 is the flow chart of multiple module paralleling full-bridge isolation DC-DC converter overpower Collaborative Control in the present invention.
Fig. 3 be under traditional inactivity balance control method, during module #1 voltage spikes, two wired in parallel system powers
Figure.
Fig. 4 be under Direct Power balance control method, during module #1 voltage spikes, two wired in parallel system power figures.
Fig. 5 be under traditional inactivity balance control method, during module #1 voltage spikes, two module output voltages and electric current
Figure.
Fig. 6 be under Direct Power balance control method, during module #1 voltage spikes, two module output voltages and electric current
Figure.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
Control method of the present invention includes：Each module input voltage and output voltage are gathered, by being balanced based on Direct Power
Control method obtains the size of Phaseshift controlling amount, generates switch controlling signal, completes output-parallel full-bridge isolation DC-DC converter
Control；Control device of the present invention is included：Data acquisition module 01, outer voltage PI modules 02, overpower Collaborative Control module
03rd, 05 5 parts of Phaseshift controlling amount computing module 04 and modulation module.Details are as follows for control method：
Step 1：Output voltage U is obtained by data acquisition module 01oElectricity is inputted with parallel module #i (i=1,2 ... n)
Press Uini.In outer voltage PI modules 02, output voltage UoFor the input of outer loop voltag PI controllers, the output of its PI controller
For virtual power specified rate P*, the quantity of power is the input quantity of overpower Collaborative Control computing module 03.
Step 2：To avoid, parameter is mismatched or input voltage amplitude is unequal causes over-current phenomenon avoidance, should ensure that each parallel connection
Module transfer power set-point pi *It is equal, have
p1 *=p2 *=...=pi *=...=pn *=p*/n
Wherein, pi *For module i transimission power set-points.However, the modular power amount is only the non-overpower of each parallel module
When expression formula, controlled when system transimission power is excessive, it is necessary to carry out overpower collaboration to each DC-DC convertor module in parallel
System, i.e. the power overflow part mean compensation algorithm for having reached the generation of full power module is transferred to and not yet reaches that full power transmits mould
In block.
Overpower Collaborative Control computing module 03 implements process and is：
Any parallel module #i (i=1,2 ... n) can transmit peak power expression formula and be：
Wherein, p* i,maxCan transimission power, U for module #i maximumsoFor output voltage, UiniFor module #i input voltages, niFor
Module #i transformer voltage ratios, LiFor module #i equivalent inductances.
Overpower cooperative control method is：
1) to each module can transimission power maximum sort, obtain maximum sequencing table, it is ascending to be designated as p successively* 1,max、p* 2,max、……、p* n,max(can transimission power maximum can be drawn by formula (1)).
2) p is compared*/ n in sequencing table with being respectively worth, if p* J, max<p*/n<p* J+1, max
3) [p is compared*-(p* 1, max+p* 2, max……+p* J, max)]/(n-j) and p* J+1, maxSize, if after the former is less than
Person, then be transferred to Step4；No person is transferred to Step5
4) module # (j+1) is entered as [p to module #n power after sorting*-(p* 1, max+p* 2, max……+p* J, max)]/
(n-j)；After sequence module #1 to module #j power assignment be respectively its maximum power value.
5) j=j+1 is entered as to j, continues to be transferred to Step3
Step 3：Obtaining each parallel module by overpower Collaborative Control module 03 should transimission power amount, the transimission power amount
Into Phaseshift controlling amount computing module 04.In Phaseshift controlling amount computing module 04, according to quantity of power expression formula after each module reduction
It can obtain Phaseshift controlling amount calculation formula
And then try to achieve each module Phaseshift controlling amount Di。
Step 4：According to solving to obtain Phaseshift controlling amount Di, using single-phase shift mode control, opened by modulation module 05
Control signal is closed, so as to complete the control that full-bridge isolates DC-DC converter.
A kind of multimode full-bridge isolation DC-DC converter power balance controller of the present invention, including data acquisition module
Block 01, outer voltage PI modules 02, overpower Collaborative Control module 03, Phaseshift controlling amount computing module 04 and modulation module 05；
The data acquisition module 01 is connected respectively to outer voltage PI modules 02, overpower Collaborative Control module 03 and phase
Move controlled quentity controlled variable computing module 04；The outer voltage PI modules 02 are also connected to overpower Collaborative Control module 03；It is described to cross work(
Rate Collaborative Control module 03 is connected to Phaseshift controlling amount computing module 04；The Phaseshift controlling amount computing module 04 is connected to modulation
Module 05；
The overpower Collaborative Control module 03, for each parallel module maximum transmission power comparative analysis, circulation to be mended
Computing is repaid, each parallel module transimission power set-point is obtained；
The Phaseshift controlling amount computing module 04, for input voltage, output voltage and overpower Collaborative Control mould
The virtual power set-point that block 03 is exported carries out simplified operation, obtains real-time Phaseshift controlling amount；
The modulation module 05, the Phaseshift controlling for being obtained according to calculating measures full-bridge isolation DC-DC converter
Switching device pulse control signal.
As shown in figure 1, control device of the present invention is divided into data acquisition module 01, outer voltage PI modules 02, overpower association
With control module 03,05 5 parts of Phaseshift controlling amount computing module 04 and modulation module.
1) overpower Collaborative Control module 03
Calculated by overpower Collaborative Control, obtain each full-bridge isolation DC-DC convertor module power specified rate P in parallel*
Expression formula.As shown in Fig. 2 being ranked up first to each module maximum amount of power, then tentatively mean power amount p is judged*/n
Fall in some module peak power segment, provided with p* J, max<p*/n<p* J+1, max.The judgement is then based on, is back through one
Row circulation compensation operation judges that module should transimission power amount set-point after being sorted.
2) Phaseshift controlling amount computing module 04
The modular power set-point that input voltage, output voltage and overpower Collaborative Control module are provided is integrated
Computing, obtains real-time Phaseshift controlling amount.Overpower Collaborative Control module 03 give each module should transimission power set-point,
Bring each module input voltage of output voltage into again, each module Phaseshift controlling amount size can be drawn by formula (2).
Claims (2)
1. a kind of multimode full-bridge isolates DC-DC converter method for controlling power balance, it is characterised in that comprise the following steps：
Step 1：Output voltage U is obtained by data acquisition module (01)oWith parallel module #i input voltages Uini, i=1,2 ...
n；In outer voltage PI modules (02), output voltage UoFor the input of outer loop voltag PI controllers, the output of its PI controller
For virtual power specified rate P*, the quantity of power is the input quantity of overpower Collaborative Control module (03)；
Step 2：Ensure each parallel module transimission power set-point pi *It is equal, have
p1 *=p2 *=...=pi *=...=pn *=p*/n
Wherein, pi *For module i transimission power set-points；Any parallel module #i can transmit peak power expression formula and be：
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In formula, p* i,maxCan transimission power, U for module #i maximumsoFor output voltage, UiniFor module #i input voltages, niFor mould
Block #i transformer voltage ratios, LiFor module #i equivalent inductances；
Overpower Collaborative Control is carried out, is specially：
1) by formula (1) calculate can transimission power maximum, to each module can transimission power maximum sort, obtain maximum sequence
Table, it is ascending to be designated as p successively* 1,max、p* 2,max、……、p* n,max；
2) p is compared*/ n in sequencing table with being respectively worth, if p* J, max<p*/n<p* J+1, max；
3) [p is compared*-(p* 1, max+p* 2, max……+p* J, max)]/(n-j) and p* J+1, maxSize, if the former is less than the latter,
It is transferred to step 4), no person is transferred to step 5)；
4) module # (j+1) is entered as [p to module #n power after sorting*-(p* 1, max+p* 2, max……+p* J, max)]/(n-j)；
After sequence module #1 to module #j power assignment be respectively its maximum power value；
5) j=j+1 is entered as to j, continues to be transferred to step 3)
Step 3：By overpower Collaborative Control module (03) obtain each parallel module should transimission power amount, the transimission power amount enters
Enter Phaseshift controlling amount computing module (04)；
Step 4：In Phaseshift controlling amount computing module (04), Phaseshift controlling is obtained according to quantity of power expression formula after each module reduction
Measure calculation formula
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Try to achieve each module Phaseshift controlling amount Di；
Step 5：According to solving to obtain Phaseshift controlling amount Di, using single-phase shift mode control, switch control is obtained by modulation module (05)
Signal processed, completes the control that full-bridge isolates DC-DC converter.
2. a kind of multimode full-bridge isolates DC-DC converter power balance controller, it is characterised in that
Including data acquisition module (01), outer voltage PI modules (02), overpower Collaborative Control module (03), Phaseshift controlling amount
Computing module (04) and modulation module (05)；
The data acquisition module (01) be connected respectively to outer voltage PI modules (02), overpower Collaborative Control module (03) and
Phaseshift controlling amount computing module (04)；The outer voltage PI modules (02) are also connected to overpower Collaborative Control module (03)；
The overpower Collaborative Control module (03) is connected to Phaseshift controlling amount computing module (04)；The Phaseshift controlling amount computing module
(04) it is connected to modulation module (05)；
The overpower Collaborative Control module (03), for each parallel module maximum transmission power comparative analysis, circulation compensation
Computing, obtains each parallel module transimission power set-point；
The Phaseshift controlling amount computing module (04), for input voltage, output voltage and overpower Collaborative Control module
(03) the virtual power set-point of output carries out simplified operation, obtains real-time Phaseshift controlling amount；
The modulation module (05), the Phaseshift controlling for being obtained according to calculating measures opening for full-bridge isolation DC-DC converter
Close device pulse control signal.
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Cited By (2)
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|---|---|---|---|---|
| CN113394982A (en) * | 2021-06-23 | 2021-09-14 | 湘潭大学 | Transient voltage and power balancing method for cascaded H-bridge type power electronic transformer |
| CN115085557A (en) * | 2022-06-30 | 2022-09-20 | 福州大学 | Multi-module direct current converter power balancing method based on model predictive control |
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